摘要
对相同压缩比的3种燃烧室进行了三维数值计算,分析了燃烧室形状对柴油机燃烧过程、NOx和soot在缸内的分布区域形成的原因,进一步用Φ-T图研究了3种燃烧室在不同时刻对NOx和soot的影响。结果显示:敞口燃烧室更有利于混合气的形成和燃烧,NOx和soot排放低于直口和缩口燃烧室。
Three types of combustion chamber with the same compress ratios was simulated,effect of combustion chamber shape was analyzed on combustion process,origin for the formation of NOx and soot distribution regions in cylinder,the Φ-T diagram was used to investigate impact of three types of combustion chamber on formation region of NOx and soot at different moment.The studies indicated: open combustion chamber is more conducive to the formation of mixture and combustion,on emissions performance,open combustion chamber better than straight combustion chamber and reentrant combustion chamber.
出处
《现代车用动力》
2010年第4期32-37,共6页
Modern Vehicle Power
关键词
柴油机
燃烧室
数值模拟
排放
diesel engine
combustion chamber
numerical simulation
emissions